Lubricating apparatus



. Aug. 27, 1935. A. w. ARNOLD LUBRICATING APPARATUS Filed Nov. 3, 1932 4 Sheets-Sheet 1 44' (Ittorneg 7, 1935. A. w. ARNOLD 2,012,782

LUBRICATING APPARATUS Filed Nov. 5; 1932 4 Sheets-Sheet 2 Aug. 27, 1935 A, w ARNOLD 2,012,782

LUBRIGATING APPARATUS Filed Nov. 3, 1932 I 4 Shets-Sheet 3 A Q 5 H \y w m M Aug. 27, 1935. A. w. ARNOLD LUBRICATING APPARATUS Filed Nov. 5, 1932 4 Sheets-Sheet 4 Patented Aug. 27, 1935 UNITED STATES LUBRIOATING APPARATUS Albert w. Arnold, Miami, Fla. n Application November 3, 1932, Serial No.. 641,065 7 PATENT? '1 Claims. (01. 103-153) This invention relates to an improvement in lubrication apparatus, such as is employed for instance for lubricating machinery or automobiles, or the like, wherein a lubricant, such as grease, is forced under pressure to the parts of the machine, in order to insure complete lubricating thereof.

' My invention utilizes fluid actuated pumping means for the lubricant which pumps the lubricant from a container to the bearings of the machine elements and has automatic means for controlling the supply of fluid to the pumping means. It is intended to use compressed air primarilyas the fluid actuating means and I have a valve mechanism for controlling the supply of air to the pump piston, and which valve means is controlled automatically in accordance with the movement of the pump piston, so as to be opened when the piston returns to its backward position, but isclosed with a snap action when the piston moves to its extreme outward position.

The pump piston has a cup washer at the end thereof, and in order to prevent undue wear of said cup washer, while at the same time to draw in a full volume of lubricantfrom the container, I provide slots in the sides of the pump cylinder through which the pump piston moves. These slots, rather than mereholes, prevent a wearing out of the cup washer as would be caused by a series of holes in the sides.

' In the accompanying drawings, Fig. 1 is a perspective view of my complete invention;

Fig. 2 is a partial sectional view on the line 1-2 of Fig.

Fig. 3 is a side elevation of the invention;

Fig. 4 is an end elevation thereof Fig. 5 is a vertical sectional view on the line, 5-5 of Fig. 3;

. Fig. 6 is a sectionalview through the pump cylinder structure and the lower end of the tank;

Fig. 7 is a detail transverse sectional view on the line 1-1 of Fig. 6;

Fig. 8 is a partial sectional view on the line 8-8 of Fig. 5; and

Fig. 9 is a similar view on the line 99 of Fig. 5. V

I have shown the invention as mounted on a wheeled truck in order to permit it to be moved easily about from place to place, the truck body or platform being designated I, and mounted on main wheels 2 at one end thereof, and a swiveled guide'wheel 3 at the other end thereof, which permits the truck to be easily turned when moving from-place to place. 7

Mounted on the truck body or' platform l-is a casting or block 4,:shown in.-sect ioni"in-Fig. 6, andwhich block supports the lubricant tank :5, thereon, the tank being shown as having. itsi bot+ tom bolted to the top face of theblock'l and resting thereomxas shown in"Fig.f6. Thebottom of the tank 5 has a discharge .opening whichi's in open communicatiomwith a. chambercG inxthe block 4. Extending transversely through the block 4, .andkthrough the chamberqli, is a 'bushiing 1, which forms the pump. cylinder 'andawithin which. the pump piston Boperates. stfIheixoute'r end of the pump piston 8 :has a-cup washer-5.9, detachably secured thereto, and :forming. a pack ingfor the piston. i}. f *1 The sides of-the bushing I having elongated slots I0 formed therein and ;which allow.-ithe;lu-.

bricant to flowior be drawn into the cylinder l'l. By having the: slotstlllelongated ratherg'than small holes. along the bushing 1, the cup lwasher 9 will. last much longer than if it wasusedwith the'holes.

The free end of thepump cylinder Tis closed by a spring pressed check-valve II, and the ex.- treme end thereof may be connected-with ahose l2, shown in Figs. 1 and -3,"lea'ding.ftocthe'bear ings or machine parts to which the lubricantsls to be supplied. 3

Also mounted on the truck body,-l:-'at .the"op%- posite. end portion thereof from theblock-l', is a valve casing 13, within whichhisl mountedia tapered 'controlvalve l4, shown in sectionsin Figs. 5 and 9. The valve M has :a:fl'uid supply opening l5, extending therethroughin alignment with a fluid passageway I 6 in the casing l3,:'which passageway is connected at one: end'with a:cut-

off valve structure designated generally by {the numeral [1, and 1 which cut off valve structure may be of any well-known form suitable for man- 'ually regulating. the supply of fluid lto :theipjassa'gewayJG; A hose l8 orl other.eonduitrmam-be used for supplying fluid torthe valves :Preferably 'I employ compressed air since it isusually, more convenient and available, blltlfillY'OthBl. suitable fluid desired may be used},

The opposite ends ofthe fluid'supply opening l5, and passageway 16, are flared or belle-mouthed, 'as indicated at'l5tt'and 16a, respectively. r-The purpose of this is to prolong the period that the fluid passes through thefluid supply .openingand the fluid passageway, and insure apressure pree determined by the size of the opening I 5, through the valve and the passagewaytlfi. '-In this .way I am enabledtouse a relativelysm'all fluidsupply opening I5; through the valvejlliandrfluid its cylinder 15m take in a new supply of lubri-v cant.

Attached to the inner end of the piston ZlL is a cup washer 22 with its apex arranged approximately in alignment with the passageway l6 and secured to the end of the piston 20 as by a screw 23. This cup washer is 'preferably'of leather and lies flat against the conical end of;the piston but has flaring sides 24 which lie against the sides of thepcylinder l9,fsothat the fluid being diverted-bythe: conical shaped cupwasher 22 will act on the sides 24 thereof; which forms sealing portions around thepiston as; an effective packingtherefor. f The'orifice lithr'oughithe valve I4 when reglst'erd with the passageway l6, admits fluid-under pressuretoithe end of the power cylinder l9. and causes outward movement ofthepistonsZil and 8. When these have moved. to their outerspositions; a discharge orifice 25 is brought into registry with an end of the passageway {6 to release the fluid from the cylinder I9 into the atmosphere and upon this reductionv in pressurethe spring 2| returns the pistons to their retracted posltions- 1 j a The means for turning the valve 14 insynchro- -nisni with the movementTof thepistons; is shown in'Flgs. 1', 2, 3, 5 and"8. Referring to Fig. 5, the valve H which is conical and which isfitted in asimilarly shaped seat, isheld against itsseat by means of a spring 26, which is arranged ina recess'fl' in the valve, sothat' one end' bears --against.the valve, whilethe other end bears against a plate "rigidly fixed to thelcasing "l3 where it is heldlin place by bolts 'and/ or screws 291' The'eirpansive vaction ofv the spring 26.:keep's the valve l4 properly seated, even 'thoughtur'ned inthecasin gf :x J H V Theplate 28 has an arcuate' slot .30.:the'rein through which projects a pin/3| attached tothe end of the valve H, so as to be rigid therewith. A bolt or journal pin 32 is supported by the plate 28; on which bolt or -pin 32 .is'journaled a; cam V disc' 33, shown inFig. 2, which. disc" has a'cam.

projection 34 on one side thereof, and has arcuate slots 35 and 36 ondiametrically opposite sides '0! the-journal 32, the slot'l35' receiving the .pin 3| attached to the valve l4. A'nactuating disc 31 is journaled on the pin or bolt 32' in faceabutting relation-with the cam disc 33 and the actuating disc '3T'carries-e pin" 38' in. position to project into the slot 33 of the cam .disc 33. The actuating disc '31 has-an? arm 39 pivotallyIconnectedwith one end of a connecting rod 4|], the foppositeend '0! which ispivotally connected witha head member ll rigidly attached to .thepump piston 8,so

as to be moved therewith and bysuch movement to tum the actuating disc,31f on the journal 32. The rocking of the valve 14, causes .the fluid 'supplyopening 15,. to move out of alignment'with the passageway IE, but the bellsmouth ends;=l5c "and 16a, being of greater diameter than thediameter of the opening l5, and passa'gewayizlt, make possible the further rocking oftthewalve it, after the latter has moved the fluid supply opening l5, out of direct alignment with the passageway IS. The result of this is to start the movement of the valve l4, thus enabling the cam disc 33, to continue to complete the rocking movement of the valve;

The periphery of the cam disc 33 and the cam projection 34 thereof have a roller 42 bearing thereon, being carried by a rod 43 which is pressed against the periphery of thedisc by a spring 34 as shown in Figs. 1, 2 and 3. The rod 43 is slidably mounted in guides 65 carried at a ;side of the cylinder l5.

There will normally be a constant pressure of fluid in'the inlet side of the passageway l6 and when'thevalve M- is turned to the position shown inl 'ig. 9, this pressure will act on the piston 20 forcing the same outwardly against the tension of the spring 2! and also forcing the pump piston 8 to the left'in Fig. 6 which forces the lubricant outjof the cylinder 1 to the desiredipoint of lubrication; As the piston 3 moves outwardly, itcarries with it the head ll moving the connecting rod .40 to turn the actuating disc '31'on its jour-' nal 32; The, initial movement allows the pin 38 to move'in the slot, 35, and thereafter to move the cam disc 33, such movement being slightly'resisted by the spring pressed roller 42, but after the cam projection 34 has passedthe roller 42, the action of the spring 44 accelerates the movement. of the cam disc so asto turn the valve H with a snap actionto' bring the exhaust port 25 into'registry with the inner endportion of the passageway l6; t T I 1 During the first part of this movement the pin 33 is moved in the slot36 into the position shown iri'Figx2, where it begins to-turn the cam disc 33,'but the valve l 4 does not move because the pin 3| is in the slot 35 which allows the disc to: turn without. turning the valve. By the time that the cam projection 34 has moved beyond the spring pressed roller 42-, the valve 1 d is also being turned and which'therefore allows the. snap action of the spring pressed roller to move the valve, theslot 33 in the plate 28., limiting such movement. As the piston 23 is returned to its initial position shown in Fig. 9, by the expansive action of the spring 2!, these actions arereversed to turn the parts sothatby the time the piston is in its backward position, the valve I l-is also'moved to the position shown in Fig. 9 and fluid is again admitted to the cylinder IS. The admission and cut-off of fluid is thereby controlled automatically by the action of the pistons.

The reciprocation of the pumping piston 8 in its cylinder'iorces the lubricant from the chamber 3 out through. the cylinder! .to the desired point where it is intended to be.used.'

I claim: 7

1. Ina machine of' the character described, a lubricant pump comprising .a block having a chamber therein, 'a' bushing extending through the chamber and having a'plurality of relatively narrow:peripheralslots therein elongated lengthwise of the bushing and locatedwithin the chamber, and .a piston operatively mounted in the bushing. I

2. In a machinerofvthe character described, a lubricant pump: comprising a; block having a chamber therein, a bushing extending through the chamber and having a plurality of relatively narrow peripheral slots therein elongated length-7 wise ofthe bushing and located within the chamber; a piston operatively mounted in the bushing for forcing lubricant therefrom, and an expansible packing washer attached to the end of the piston and having sides bearing against the sides of the bushing.

3. Lubricating apparatus comprising a structure having an enlarged chamber therein, a bushing extending through the chamber with the periphery thereof spaced from opposite side walls of the chamber providing open communication around the bushing within the chamber, said bushing having a plurality of relatively narrow radial slots therein elongated lengthwise of the chamber and located within the chamber providing communication therethrough from different sides of the chamber, and a pump piston operatively mounted in the bushing and having a cup washer at the free end thereof.

4. Lubricating apparatus comprising a block having an enlarged chamber therein open at the top of the block and approximately of uniform diameter from the top to the lower end thereof, 7

a bushing extending through the chamber with the periphery thereof spaced from opposite side walls of the chamber providing open communication around the bushing within the chamber, said bushing having a plurality of relatively narrow radial slots in different sides of the bushing within the chamber, and a pump piston operatively mounted in the bushing and having a cup washer at the free end thereof.

5. In lubricating apparatus, a lubricant pump 7 comprising a pump cylinder having a plurality of long narrow peripheral slots for admitting lubricant into the cylinder, and a piston operatively mounted in the cylinder and having an expansible packing member attached thereto.

6. In lubricating apparatus, a lubricant pump comprising a bushing forming a pump cylinder and having a plurality of long narrow peripheral slots therein being elongated lengthwise of said bushing, and a piston operatively mounted in the cylinder and having an expansible flexible packing-member attached thereto.

7. In lubricating apparatus, a lubricant pump comprising a pump cylinder having a plurality of long narrow peripheral slots for admitting lubricant into the cylinder, and a piston operatively mounted in the cylinder and having expansible packing means attached thereto, the slots being of a width to prevent expansion of the packing means thereinto during operation of the piston.

ALBERT W. ARNOLD. 

